An achromatic lens or achromat is a lens that is designed to limit the effects of chromatic and spherical aberration. Achromatic lenses are corrected to bring two wavelengths (typically red and blue) into focus in the same plane. The most common type of achromat is the achromatic doublet, which is composed of two individual lenses made from glasse...
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is a combination of lenses made of different glass. These bring two wavelengths into focus (normally red & blue) on the same plane. Achromatic lenses are used to take chromatic aberrations away from images.
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A special camera lens that adjusts the dispersion of foci for different colors. Accordingly, the colors are focused at the same point and the correctiive process facilitates an even distribution of the color scheme in a given shot. On some occasions the process utilizes two lenses of different materials -- one lens acts as the corrective for the ot...
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http://www.allmovie.com/glossary/term/achromatic+lens
(from the article `Hall, Chester Moor`) English jurist and mathematician who invented the achromatic lens, which he utilized in building the first refracting telescope free from chromatic ... ...colour. Chromatic aberration can be eliminated by combining a strong lens of low-dispersion glass (crown) with a weaker lens made of ... [7 ...
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http://www.britannica.com/eb/a-z/a/12
A compound lens made of two or more lens's having different indices of refraction, so correlated as to minimise chromatic aberration. ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973
one corrected for chromatic (color) aberration.
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An 18thC development combining FLINT GLASS and crown glass to remove distorting colour fringes from the image. It was patented by Englishman John Dollond in 1758 and used in telescopes and microscopes.
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Type: Term Definitions: 1. a compound lens made of two or more lenses having different indices of refraction, so correlated as to minimize chromatic aberration.
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http://www.medilexicon.com/medicaldictionary.php?t=48760
[
n] - a compound lens system that forms an image free from chromatic aberration
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http://www.webdictionary.co.uk/definition.php?query=achromatic%20lens
achromatic lens A compound lens made of two or more lenses having different indices of refraction, so correlated as to minimize chromatic aberration.
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http://www.wordinfo.info/words/index/info/view_unit/1164/
Lens for which all light colours have the same focal length made from two or more components with different refraction indices (e.g., crown glass and flint glass), used to correct for chromatic aberration.
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https://www.encyclo.co.uk/local/20687
noun a compound lens system that forms an image free from chromatic aberration
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https://www.encyclo.co.uk/local/20974
Combination of lenses made from materials of different refractive indexes, constructed in such a way as to minimize chromatic aberration (which in a single lens causes coloured fringes around images because the lens diffracts the different wavelengths in white light to slightly different extents)
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a system of two or more lenses that is substantially free from chromatic aberration and in which the lenses are made of different substances so that the focal length of the system is the same for two or three wavelengths of light. Also calledCf. crown lens, flint glass.
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https://www.infoplease.com/dictionary/achromatic-lens
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